add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/x86/kernel/io_delay.c
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@@ -13,7 +13,22 @@
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 #include <linux/dmi.h>
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 #include <linux/io.h>
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-int io_delay_type __read_mostly = CONFIG_DEFAULT_IO_DELAY_TYPE;
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+#define IO_DELAY_TYPE_0X80	0
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+#define IO_DELAY_TYPE_0XED	1
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+#define IO_DELAY_TYPE_UDELAY	2
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+#define IO_DELAY_TYPE_NONE	3
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+
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+#if defined(CONFIG_IO_DELAY_0X80)
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+#define DEFAULT_IO_DELAY_TYPE	IO_DELAY_TYPE_0X80
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+#elif defined(CONFIG_IO_DELAY_0XED)
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+#define DEFAULT_IO_DELAY_TYPE	IO_DELAY_TYPE_0XED
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+#elif defined(CONFIG_IO_DELAY_UDELAY)
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+#define DEFAULT_IO_DELAY_TYPE	IO_DELAY_TYPE_UDELAY
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+#elif defined(CONFIG_IO_DELAY_NONE)
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+#define DEFAULT_IO_DELAY_TYPE	IO_DELAY_TYPE_NONE
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+#endif
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+
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+int io_delay_type __read_mostly = DEFAULT_IO_DELAY_TYPE;
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 static int __initdata io_delay_override;
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@@ -24,13 +39,13 @@
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 {
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 	switch (io_delay_type) {
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 	default:
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-	case CONFIG_IO_DELAY_TYPE_0X80:
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+	case IO_DELAY_TYPE_0X80:
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 		asm volatile ("outb %al, $0x80");
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 		break;
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-	case CONFIG_IO_DELAY_TYPE_0XED:
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+	case IO_DELAY_TYPE_0XED:
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 		asm volatile ("outb %al, $0xed");
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 		break;
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-	case CONFIG_IO_DELAY_TYPE_UDELAY:
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+	case IO_DELAY_TYPE_UDELAY:
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 		/*
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 		 * 2 usecs is an upper-bound for the outb delay but
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 		 * note that udelay doesn't have the bus-level
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@@ -39,7 +54,8 @@
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 		 * are shorter until calibrated):
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 		 */
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 		udelay(2);
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-	case CONFIG_IO_DELAY_TYPE_NONE:
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+		break;
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+	case IO_DELAY_TYPE_NONE:
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 		break;
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 	}
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 }
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@@ -47,9 +63,9 @@
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 static int __init dmi_io_delay_0xed_port(const struct dmi_system_id *id)
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 {
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-	if (io_delay_type == CONFIG_IO_DELAY_TYPE_0X80) {
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+	if (io_delay_type == IO_DELAY_TYPE_0X80) {
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 		pr_notice("%s: using 0xed I/O delay port\n", id->ident);
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-		io_delay_type = CONFIG_IO_DELAY_TYPE_0XED;
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+		io_delay_type = IO_DELAY_TYPE_0XED;
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 	}
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 	return 0;
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@@ -115,13 +131,13 @@
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 		return -EINVAL;
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 	if (!strcmp(s, "0x80"))
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-		io_delay_type = CONFIG_IO_DELAY_TYPE_0X80;
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+		io_delay_type = IO_DELAY_TYPE_0X80;
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 	else if (!strcmp(s, "0xed"))
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-		io_delay_type = CONFIG_IO_DELAY_TYPE_0XED;
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+		io_delay_type = IO_DELAY_TYPE_0XED;
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 	else if (!strcmp(s, "udelay"))
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-		io_delay_type = CONFIG_IO_DELAY_TYPE_UDELAY;
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+		io_delay_type = IO_DELAY_TYPE_UDELAY;
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 	else if (!strcmp(s, "none"))
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-		io_delay_type = CONFIG_IO_DELAY_TYPE_NONE;
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+		io_delay_type = IO_DELAY_TYPE_NONE;
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 	else
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 		return -EINVAL;
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